Stand



H; u. TIFFANY.

sum). APPLICATION FILED OCT. 4,1920.

Patented Aug. 15, 1922.

2 SHEETS-SHEET I.

INVENTOR Arm/MY:

' H.G.TIFFANY.'

STAND.

APPLICATION FILED OCT- 4, I920.

Patented Aug. 15,1922.

SHEETS-.SHEEF 2. I

' INVENTOR 505/90 5/44/75 77FF/7/V).

BY ATTORNEYS 2 I To all whom it may mm.-

nen'ran eret t nr'nno eILLAs TIFFANY, on ST; tours, liissouar.

s peeifieationof Letters Eatent.

STAND.

Application filed. coroner 4,1920. Serial No. 414,585.

Be it known that I, Hrnno GILLAs T-rriri nr, a citizen of the United States, residing at St. Louis, Missouri, have invented a certain new and useful Improvement in. Stands, of

. which the following is a full, clear, and exact lowerin mechanism is adapted to of the rock shafts that forms partof description, such as will enable others skilled in the art to which it appertains to make and use the same. i

This invention relates to stands of x the kind that are equipped with rollers or casters for facilitating the'movement of the stand from one place to another, and also providedwith means for raisingthe rollers out of con-.=' tact with the floor on which the stand rests; when it is desired to support the stand rigidly in a stationary position. a One object of my invention is to prov de an efficient stand of the general type referred to, which is of such design that. there are no.

portions at the lower ends of the legs which form lateral projections on which a person s apt to trip when passing the stand. Another object is to provide a standof the general type referred to whoserais ng and ated by the users foot.

And still another object is to provide a stand raising and lowering mechanisni'of rugged construction that is inexpensive to manufacture and easy to apply. Other ebjects anddesirable features of my'invention will be hereinafter pointedout;

Figure 1 of the drawings is a perspective view of a stand constructed in accordance with my inventionu l Figure 2 is an enlargedvertical sectional view of the lower end portion of one of the legs. r Figure 3 is across sectional View of one the raising and lowering mechanism. V

Figure 4 is a sideelevational V16\V of the lower portion ofthe stand, showing thesup porting members in their raised pos1t1on, ory out'of contact with the floor.

Figure 5 is asimilanview show ng the supporting members depressed; and I Figure 6 is a deta1l;view,-partly 1n section,

illustrating the means used for supporting the rock shafts. I l

Referring to the drawings which illustrate the preferred form of my invention, A designates the legs of the stand which are preferably formed from pieces of metal tublng, B designates rollers or casters arranged at beeper- I I t A sufficiently to liftthe rollers B from; the

the lower endsof the'legs, A, designates tubular-shaped. supporting members arranged in telescopic. relation with the lower end portion. of-the legs A. i It is immaterial, so far as my-broad idea .isconcerned, what p type of rollers or casters the legsofthe stand 1 areequipped with, butI prefer to provide 1 each leg with a spherical-shaped roller B,; mounted in a socket 'l-provided vvith a shank 2 that projects upwardly intothe lowerend;

of the leg, as shown in; Figure 2. The supporting members C can be formed invarious ways w thout departingfrom the. spiritfo'f my nvention, but'I prefer to equipceaeh leg with a supporting. member of substantially tubular-form whoselupper end is of suchdiameter that'it will telescopefr'eelyeve th lower end portio-nof'the leg and whose lower."

end portionis ofsuch diameterthat it will surround or inclose the socket or bearing of the roller B mounted in the :lower endof'xthe leg. The fourqsupporting members Got the stand are combined with an operating 'mechanism which is adapted to bemov'ed in one.

direction so as to depress the supporting members C, and thus bodily raise the, legs floor, and moved, in the'opposite "direction;

so as to lower the legs and raises'aid -supporting members C out, of contactwith the floor.

In the form of my invention herein illus trated said operating mechanism consists ofv two .horizontally disposed, transverse rock shafts D and D arranged atthe front and at the rear of the standiadjacentqthe lower ends of the legs A,rigid arms 3 on said rock shafts connectedby means of links 4t to the supporting members C, an operating device,

and D tothe supporting members 0, and said arms and links are so proportionedand arranged that whensaid rock shafts are'in one'position, the supporting members C willv be held out of contact. withthe floor, thus causing the legs of the stand to be supported; by the rollers 13, as shown in Figure/1. Atf

such times the stand'can be moved easily from one place to another, due,-of course, to the fact that it is supported by rollers.

v When it is desired to hold the stand perfectly rigid and in a stationary position, the v 95 7 preferably arigid foot piece 5, on the rock: shaftl), and a link 6 that connects the roclt shafts D and D'gtogether-soas to cause them to" move in'unisonv The arms 3 and links t. transmit movement from the rock shafts D operator places one foot on the operating device 5 and depresses the front end of said device so as to rock the shafts and D 1n such a direction that the arms 3 thereon and the links 41 connected to said arms will force the supporting members C downwardly into engagement'with the floor. After said members C have come in contact with the floor further movement of said rock shafts in this direction operates to raise or bodily lift the legs ii. of the stand, due to the fact that the arms 3 and links 4: form toggles whose lower ends are connected to thememhers C which bear against the floor and whose upper ends are connected to the legs of the stand through the instrumc'ntality of the rock shafts D and D. The link 5 previously referred to is pivotally connected at its opposite ends to brackets 'l' on the rock shafts D and D which are so proportioned that the lower edge of said linlr will strilre against the base portion of thebraclret 7 on the rear rock shaft D when the toggles formed by the arms 3 and links l have become straightened, thus limiting the movement of said toggles and causing the operating mechanism for the supporting members C to be loclred in its operative position shown in Figure 5.

Vlhcn it is desired to move the stand the operator simply places one foot on the operating device 5 and depresses the heel end of same so as to impart movement to the rock shafts D and D in a direction to breal; the toggles formed by the arms 8 and links f, and thus permit the legs of the stand to move downwardly relatively to the supporting members C.

It is immaterial how the legs A of the stand are braced or connected together, but I prefer to connect the upper end portions of the legs together by two cross pieces 8 arranged at the sides of the stand and two transversely-disposed cross pieces 9 arranged at the front and at the rear of the stand. The lower end portions of the legs are connected together by two cross pieces 8 arranged at the sides of the stand and'the two transversely-disposed rock shafts D and D )reviousl referred to said rock shafts being so mounted that they can turn or oscillate on bearings carried by the legs A, as shown in Figure 6. The bearings that sup port the rock shafts D and D preferably consist of cylindricalshaped lugs 10 on plates 11 which are clamped'to the legs A by tie rods 12 arranged inside of the rock shafts and provided at their ends with screw-threaded portions which pass through the legs. A. tle rod 12 1s assoclated with each of the rock shafts, as shown in Figure (3, and the opposite ends of said tie rod are threaded so as to receive nuts 13, one of which is arranged at one side of the hearing plate 11 and the other at the side of a cooperating plate 11*. While l. prefer to mount the rock shafts D and D in the manner above described, I wish it to be understood that it is immaterial, so far as my broad idea is concerned, how said shafts are mounted or combined with the legs A of the stand.

A stand of the above construction is an improvement on the stands nowused eaten sively for supporting calculating machines, because their are no portions at the lower ends of the legs of the stand which form lateral projections over which a person is apt to trip in passing the stand; the stand can be moved easily from one place to another when the supporting members C raised or out ofcontactwith the floor, and when said supportingmembers G are depressed and locked they hold the stand perfectly rigid and in a stationary position. The operating mechanism that moves the supporting member C'axially of the legs A so as to effect the raising and lowering of the stand can be operated by one foot of the user and still another desirable feature of such a mechanism is that it can be manufactured at a low cost and easily applied to the stand.

Having thus described my invent-ion, what I claim and desire to secure by Letters Pat ent, is:

1. A stand provided with legs equipped with rollers, a tubular member arranged in telescopic relation with the lower end portion of each leg and adapted to be moved downwardly into engagement with the floor so as to elevate the leg and the roller thereon, a pair of horizontally-disposed rock shafts carried by said legs, rigid arms on said shafts arranged adjacent the ends of same, each of said arms being adapted to co-operate with one of said tubular members, and links that join said arms to their co-operating tubular members.

2. A stand provided with legs equipped with rollers tubular-shaped. members arranged in telescopic relation with the lower end portions of the legs of the stand, a pair of rock shafts carried by said legs and connected together in such a manner that they move in unison, an actuating device on one of said rock shafts, and rigid arms on said rock shafts connected by links to said tubular-shaped members.

HIERO GILLAS TIFFANY. 

